Method of manufacturing multicolored hand tool grips

Abstract

A method of manufacturing a multi-colored hand tool grip includes a step of forming a grip, a step of forming a lid and a step of completing a finished product. In the step of forming a lid, replaceable submodules are employed to form the lid, able to lower cost of mold making. In the step of completing a finished product, after the grip and the lid are combined together and received in the mold cavity of a third mold set, raw material of a holding portion is poured into the mold cavity to form a different-colored holding portion. By so designing, the lid and the holding portion of different colors can be formed on the grip to let patterns presented more clearly, thus forming a multi-colored hand tool grip.

What is claimed is: 
     
       1. A method of manufacturing a multi-colored hand tool grip comprising:
 forming a grip, a first mold set being provided for forming the grip, the first mold set comprising a first mold board and a second mold board, the first mold board and the second mold board being able to be tightly pressed against each other to define a grip cavity, a raw material being poured into the grip cavity to be solidified to form the grip; 
 forming a lid, a second mold set being provided for forming the lid, the second mold set comprising a third mold board, a fourth mold board and a plurality of first submodules, the third mold board and the fourth mold board being able to be closely pressed against each other to define a lid cavity, the third mold board comprising at least one first combining groove, number of the first submodules being more than that of the first combining grooves, each of the plurality of first submodules comprising a first pattern surface, the first pattern surface comprising a first pattern formed thereon, the first combining grooves of the third mold board being able to accommodate one of the first submodules, an inner wall surface of the third mold board and the first pattern surface of the at least one of the plurality of first submodules being positioned at the same plane and rendering the first pattern exposed, then, a raw material of the lid poured into the lid cavity, the raw material being solidified to form the lid, the lid forming a pattern layer at a location corresponding to the first pattern of the first pattern surface of the first submodule; and 
 completing a finished product, a third mold set being provided for producing the finished product, the third mold set comprising a fifth mold board and a sixth mold board, the fifth mold board and the sixth mold board being able to be closely resisted against each other to define a mold cavity, the lid combined with the grip and together received in the mold cavity, a raw material of a holding portion being poured into the mold cavity, the raw material of the holding portion being solidified to form the holding portion around an outer circumference of the grip and further form a third pattern between the pattern layers of the lid; 
 by employing different-colored raw materials of the lid and the holding portion, the lid and the holding portion of different colors being able to be combined on the grip, thus forming a multi-colored hand tool grip; and 
 in the step of forming the lid, the fourth mold board comprising at least one second combining groove and the second mold set comprising a plurality of second submodules, the at least one of the plurality of second submodules respectively comprising a second pattern surface, the second pattern surface being formed thereon with at least one second pattern, the at least one second combining groove of the fourth mold board being able to be used for accommodating the second submodules, the fourth mold board comprising an inner wall surface connecting with the second pattern surface of the second submodule and rendering the second pattern exposed, the lid forming at least one support piece at a location corresponding to the second pattern when the lid is injection molded. 
 
     
     
       2. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 1 , wherein, in the step of forming the lid, the first pattern is protrudingly formed on the first pattern surface of the at least one of the plurality of first submodules, a pattern layer penetrating the lid is able to be formed via the first pattern when the lid is injection molded. 
     
     
       3. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 1 , wherein, in the step of forming the lid, the first pattern is recessed and formed on the first pattern surface of the at least one of the first submodules, an impending pattern layer of the lid is able to be formed via the first pattern when the lid is injection molded. 
     
     
       4. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 1 , wherein a topside of the first pattern and the second pattern surface are at the same plane and hence an underside of the pattern layer and a topside of the support piece of the lid able to be conplane when the lid is injection molded, in the step of completing the finished product, an underside of the third pattern and a topside of the support piece are able to be conplane. 
     
     
       5. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 1 , wherein, in the step of forming the lid, the first pattern of the first pattern surface contains plural recesses and projections, and an interval between every two the projections is more than 0.5 mm. 
     
     
       6. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 1 , wherein. in the step of completing the finished product, a pattern layer cavity is formed between the grip and the lid after the lid and the grip are combined together, raw material of pattern layer poured into the pattern layer cavity to be solidified therein to form a pattern layer. 
     
     
       7. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 6 , wherein, in the step of completing the finished product, the pattern layer cavity communicates with the mold cavity. 
     
     
       8. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 1 , wherein, in the step of forming the grip, the first mold set is provided with a first core and the first mold board is formed with a recessed mold surface, the first mold surface is provided thereon with a projecting edge, the projecting edge is formed thereon with a plurality of projections, the second mold board is formed with a second mold surface, the second mold surface is disposed with plural second projections, the first core axially is provided with a projecting block, surface of the projecting block is able to connect with both the first mold surface and the second mold surface, the grip forming a receiving groove and plural first recessed holes at locations corresponding to the projecting edge and the first projections of the first mold board when the grip is injection molded, the grip forming plural second recessed holes at locations corresponding to the second projections of the second mold board, the grip further forming a pouring hole at a location corresponding to the projecting block, in the step of completing the finishing product, the third mold set is formed with a second core, the second core positioned in the mold cavity, the mold cavity is larger than the grip cavity in volume, the grip fitted on the second core. 
     
     
       9. The method of manufacturing a multi-colored hand tool grip as claimed in  claim 8 , wherein the fourth mold board is provided with at least one recessed fourth mold surface, the fourth mold surface is formed with plural recessed grooves, the plural recessed grooves having their bottoms respectively bored with at least one recessed hole, number of the recessed holes is less than that of the first recessed holes.